Pump



Sept. 18, 1928.

A. G. NCRTON PUMP Filed Aug. 8, 1927 INVENTOR -/7r"Z/z,u1 6 0644012;

- (/fi/vf Ad: ATTORNEY Patented Sept. 18, 19.28.

ARTHUR G. NORTON, OF HOLLEY, NEW" YORK; ASSIGNOR TO ALERT PRODUCTS, INC.,

OF HOLLEY, NEl/V YORK, A CORPORATION OF YORK.

PUMP.

Application filed August 8, 1927. Serial No. 211,271.

The present invention relates to pumps and an object of the same is to provide a novel means of limiting the movement 01' the piston in the cylinder. Another object of the invention is to provide a novel connection between the sealing cup and't-he cylinder.

To these and other ends, the invention con-- sists of certain parts and combinations of parts all of which will be hereinafter de scribed: the novel features being pointed out in the appended claims.

In the drawings:

Fig. 1 is a sectional view through a pump constructed in accordance with this invention;

Fig. 2 is an enlarged 2--2: Fig. 1; and

Fig. 3 is a bottom view of the pump.

The present invention is shown and described in connection with a combined suction and force pump designed for cleaning stop drains, bowls and toilets but it is to be understood that the invention is not limited to pumps of this type. i

In the illustrated embodiment, 1 indicates section on the line the cylinder which is in the form of an openended tube, the lower end of which is rolled outwardly at 2 to provide a shoulder or head to the internal shoulder 3 at the in ner end ot a sleeve at projecting from the flexible sealing cup made, in this instance, of rubber in one piece with the sleeve lVith the end in view of effectively securing the sealing cup to the cylinder 1, the inter: al diameterot the 'leeve 4 is made v consi clerably less than the external diameter of the cylinder 1. The sleeve is expanded, then arranged around the cylinder and permitted to contract so as to snap behind the roll portion 3, thus providing a binding engagement ith the cylinder and prevent the sleeve moving in either direction on the cylinder. I

Operating in the cylinder is a piston rod 9 which, in this instance. is guided in a centra opening in a plug 10 fitted in the upper end of the cylinder and held therein by scr .ws 11. the rod 9 having a handle 12 above the plug. This piston rod has itslower end reduced at 13 and is externally threaded at i l at the end of the reduced portion. Two plates 15 and 16 fit on this reduce portion 13 and are held in spaced relation by y g r g which surrounds the reduced portion between the two plates. A

H. 1 nut 1.1 on. the threaded portion 14: holds the plates in position. A packing ring'18 is ar ranged between the two plates, and has slightly greater diameter, than the latter so as to engage with the interior walls of the closed by the sleeve 4. In order that the plug 6 may not i'nterterewith these lugs 21,- said plug hasradial grooves 22 which receive the lugs 20.

1 It is apparent that the movement of the piston in. the cylinder in one direction tends to create'a pressure in the sealing cup while the movement of the piston in the other direction tends to reduce such pressure and create partial vacuum. lV hen this device is used for cleaning drains, bowls and toilets. this alternate pressure and partial vacnuni tends to disturb or agitate the contents or the stopped drain, bowl or toilet so that the obstruction is eventually broken down. The means of securing the sealing cup to the cylinder gives an effective connection be tween these two-partswhich will not become separated in use. A novel and inexpensive means provided for limiting the movement of tl piston in one direction, this means bein n the form of inwardly extending lugs cut from the stock of the cylinder and pro viding openings which are closed effectively above said roll, and a sealing cup formed of rubber and having a sleeve at one end with a uniform interior diameter throughout and a shoulder at the inner end of the sleeve engaging behind the roll on the cylinder, the interior diameter of the sleeve when dota he f n the y nder be g s than the ing roll.

external, diameter of the cylinder and the piston cut fron the stock of the cylinder and sleeve being held in a stretched condition in extending inwardly, and a, sealing cup lia-vengagement with the external Wall of the ing a sleeve surrounding said cylinder ad- 10 cylinder and behind such outwardly extendja cent spid lugs to close the ,openi ngs in the i y V y cylinder inade by the formation of the lugs. 2. A pump Comprising a cylinder. a piston movable therein, limiting lugs for the ARTHUR G. NORTON. 

